Meter-testing cut-out.



T. B. MURRAY.

4ML'IER TESTING GUT-OUT. AxfrLIoATIoN rILnn JUNE 12, 191'2.

3 SHEETS-SHEET 1 G. 'y l OOOj/Z@ u @f ,w

Patented July l, 1913.

T. E. MURRAY.

2 Nr E 1MM vvd- .mu TUE du es ma, m P.. am 1 9 mlnl U2 0.1 TE uw CTU G mm Tu mr Tm RT Tf M Em.. MP .P A

T. E. MURRAY.

` METER TESTING GUT-OUT. APPLIUATION FILED J-UNB 12, 1912.

3 SHEETS-SHEET 3.

Paftea July 1, 1913 'TEO E. MURRAY, 0F NEW YGRK, N. Y.

METER-TESTING CUT-QUT.

inceste Specification of etterslatent.

Application filed June 12, 1812. Serial No. 703,117.

Eh 131 whom-it may concern: t

'Be .it known that Yl, THoMAs E. Murrow, a citizen for the United States, residing at New York, in the county of New York and :State'of'llew York, haveinvented a certain new and useful Llmprovment in Meter-lest ingCut-@uts, of which the following is a.

-specitieation mhezinvention is a meter testing cut-out,

wherein by fthe insertion of a gang plug `circuitiscclosed direct from service to load,

and thereafter by 'the insertion of a second circuit is broken from one meter terminal to Vvload and .testing apparatus theright hand-end ofig. '1, showing two of the fuse plugs in place.r :Fig: .4 is a section on the line y, y of Fig. l. Figs. and 6 .showtlie two-testing gang plugs, and Fig. 7

is a diagram illustrating the electrical connections.

Similar letters and numbers of reference indicate like parts.

The base block 1, of refractory insulating material, has fourl channels 2, 3, 4, l5. On the bottom of channel 2 is a conducting plate 6, on which are the two 'upwardly extending contacts 7 8 and one member 9 of the pair of bent over spring contacts 9, 10. On the bottom of channel 3 is a conducting plate 11, on which is the other member 10 -of said pair: and also a plate 12, .separated from plate 11, which carries two upwardly extending contacts 13, 14. Contact .14 is longer than contact 13, and extends through an opening in the'y partition between channels 3 and 4 to channel 4, where it is seated in smid partition and .is connected to the plate 15 on the bottom of said channel. On.

plate 15 are upwardly extending contacts 16, 17, 18. Also 1n channel 4 and separate from plate- 15 is a plate 19, having` upwardly extending contacts 20, 21, 22, '23.

In channel 5 are two separated conducting plates 24, 25. Plate 24 has upwardly eX- tending contacts 26, 27, 28, 29, and plate 25 has similar upwardly extending contacts 30, e1, 3e,

The fuse plugs 34, 35 are alike, and are described 'in detail in my '.copending application, Serial No. 698,397, led May 20th,

1912. Each comprises a case A of retiree#l tory insulating material, having a recess in its under side wherein are secured two of' downwardly depending contacts E, integral with said case is a projection D which enters a recess in the bott-om of the hase block. The fuse strip E has its .ends connected to the contacts C, and passes through an opening near the lower end o said projection. When fuse plug 34 is in.

place in channel 4, its depending contacts B, C enter between the pairsor contacts 14, 16: 17, 18: 20, 21, and 22, 21B-and when the fuse plug 35 is in place inchannel its d pending contacts B, C enter between thev pairs of contacts 2G, 27 t 28, 29: 30, 31, and 82, 3.,. 'lfhe contacts in channels 4, 5 .extend beyond the plugs' contacts E, C, when the same are, in place, Fig. 2. With these 'outside portions of saidl channel contacts, the contacts on the testing plugs, hereinafter de scribed, coperate-so that said testing plugs may be inserted or removed without disturbing the fuse plugs. Under normal ruiming conditions, circuit proceeds from plus service lead, to plate 25 in channel 5,'

through fuse' plug 85, to plate 24' in said channel, to the field coil F of vthe meter, to the pair of spring contacts' 9 10, to late 6 in channel 2, throu h the` load S, to plate 12 and Contact 14, to p ate 15 in channel 4, fuse plug 34,`plate 1 9, and negative service lead.

When 1t is desired to test the meter, the gang plug G shown in Fig.'5 is irst applied. Said plug comprises a support H of insulating materlal, on which are inclosing metal `frames I, J, K, L, each carrying a pair of depending contact plates M, N ,0P.

To frames Ig. L are connected the' terminals rateatcsauiynioia.

Sil

of a fuse strip Q, and'to frames J,V K are connected the terminals of a fuse striplt. This gang plug is inserted so that the niembers of its pair P of contacts cooperate with the pairs of contacts 32, 33 and 30, 31 in channel 5,; the members of its pair O with the pairs of contacts 22,. 23 and 20,21: in

channel 4; the members ofl its pair N with 4contacts 13, 14. in channel 3, and the members of'pa'ir M with contacts 7,'8 in channel 2. .In this way, as shown in Fig. the

service leads become connected directly to the lotd S, and the fuses Q., R are brought into both sides of the circuit, which profrom positive service lead, to plate 25,

nected to plate a and pair of contacts Z on .nals are connected to plate 11 'in channel 3, i

shaped plate b of insulating material. Said plug is inserted so that the plates fr.. enter between the spring contacts D, l0; the menibers of pair Z of contac in .pairs of eontacts 14, 16 and 1T, 1S in channel l, and the members of pair Y of contacts in pairs of contacts 20, 2T and 2f) in channel 5, g The ammeter and artificial load are conplug T, and the voltmeter to pairs ot con- I tacts Y and Z. The meter field coil termiand plate 24 in channel 5, and the potential i coil terminals are connected between plate g 24 in channel 5, and plate 15 in channel a'. The meter field coil circuit then proceeds as follows: from positive service lead, to plate signature in presence of two witnesses.

25, fuse plug 35, plate 24, Athrough lield coil F, to contact 10, plate a, artificialA load, amf meter, plate 15, fuse plug 34, plate lf), and i negative service lead. It will be obvious l that by this arrangement the fuses are inl terposed both in the load and testing circuits-the fuses Q, R being in the load cirr cuit, and the fuses in plugs 34, in the i testing circuit.

I claim: Vl. A meter testing cut-out, comprising a base, service, load and meter circuit terminals thereon, means for establishing circuit directly from service to load, and means ine deliendent ot" said first-named means for breaking circuit from one of said meter tei'- ininals to load and sin'iultaneously connecting test apparatus in circuit with the ref maining meter teriiiinals.

2. A meter testing cut-out, comprising a base, service, load and ni'eter circuit terminals thereon, one of said meter .tei'inii'ials being a pair of plates held in resilientv cony tact, a gang plug having projecting plates eolieratii'ig with said meter terminals and connected to testing apparatus, one of said projecting plates entering between said pair of nit-ter terminals and having on one side a eoveringof insulating material, and independent means for establishingdirect circuit from service to load.-

ln testimony whereof I have aflixed in v THOMAS 1i. MURRAY. Witnesses:

It. N. LAmLAw, F. W. Jassen. 

